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Class Information
Number: 181/160
Name: Acoustics > Diaphragm > With resonant chamber
Description: Subject matter including a compartment which is acoustically coupled to the diaphragm.










Patents under this class:
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Patent Number Title Of Patent Date Issued
8668045 Sound and vibration transmission pad and system Mar. 11, 2014
8085950 Sound signal processing apparatus and sound signal processing method Dec. 27, 2011
8005517 Mobile communication device Aug. 23, 2011
7975802 Intake air sound generation device Jul. 12, 2011
7918308 Sound and vibration transmission pad and system Apr. 5, 2011
7840023 Double-resonator micro-speaker assemblies and methods for tuning the same Nov. 23, 2010
7562646 Air-intake device for internal combustion engine having noise reduction mechanism Jul. 21, 2009
7553288 Sound and vibration transmission pad and system Jun. 30, 2009
7506626 Device and method for amplifying suction noise Mar. 24, 2009
7165647 Mechanical acoustic filter by erosion etching Jan. 23, 2007
7155021 Loudspeaker having an acoustic panel and an electrical driver Dec. 26, 2006
7011178 Sound transmitter and speaker Mar. 14, 2006
6907955 Electromagnetic electroacoustic transducer Jun. 21, 2005
6862360 Speaker system Mar. 1, 2005
6758303 Electronic device having a multi-mode acoustic system and method for radiating sound waves Jul. 6, 2004
6628790 Apparatus for on-ear operation and off-ear operation with two sound reproduction transducers Sep. 30, 2003
6549637 Loudspeaker with differential flow vent means Apr. 15, 2003
6522759 Speaker Feb. 18, 2003
6425456 Hollow semicircularly curved loudspeaker enclosure Jul. 30, 2002
6324292 Speaker apparatus Nov. 27, 2001
6298943 Bass-reflex speaker assembly Oct. 9, 2001
6223853 Loudspeaker system incorporating acoustic waveguide filters and method of construction May. 1, 2001
6160897 Apparatus for operation in an on-ear mode and an off-ear mode Dec. 12, 2000
6062339 Compact spiral cavity loudspeaker enclosure May. 16, 2000
6031919 Loudspeaker system and sound reproducing apparatus Feb. 29, 2000
5929393 Speaker cabinet with sounding board Jul. 27, 1999
5809154 Ported loudspeaker system and method Sep. 15, 1998
5740259 Pressure wave transducing Apr. 14, 1998
5710395 Helmholtz resonator loudspeaker Jan. 20, 1998
5602367 Multiple tuned high power bass reflex speaker system Feb. 11, 1997
5550921 Stereo sound source for portable computer Aug. 27, 1996
5517573 Ported loudspeaker system and method with reduced air turbulence May. 14, 1996
5513270 Speaker box Apr. 30, 1996
5479520 Loudspeaker system Dec. 26, 1995
5475764 Bandpass woofer and method Dec. 12, 1995
5394478 Low frequency sound generation system for use in vehicular passenger compartments Feb. 28, 1995
5303209 Electroacoustic transducer having a partition wall and a mask wall Apr. 12, 1994
5261006 Loudspeaker system comprising a helmholtz resonator coupled to an acoustic tube Nov. 9, 1993
5189706 Acoustic apparatus Feb. 23, 1993
5184332 Multiport underwater sound transducer Feb. 2, 1993
5173575 Acoustic apparatus Dec. 22, 1992
5111509 Electric acoustic converter May. 5, 1992
5109422 Acoustic apparatus Apr. 28, 1992
5092424 Electroacoustical transducing with at least three cascaded subchambers Mar. 3, 1992
5073946 Thin speaker having an enclosure with an open portion and a closed portion Dec. 17, 1991
5025885 Multiple chamber loudspeaker system Jun. 25, 1991
5025474 Speaker system with image projection screen Jun. 18, 1991
5012890 Acoustic apparatus May. 7, 1991
5010977 Acoustic apparatus with plural resonators having different resonance frequencies Apr. 30, 1991
5009280 Acoustic apparatus Apr. 23, 1991

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